CN210529493U - Anti-falling device of stay cable shock absorber - Google Patents
Anti-falling device of stay cable shock absorber Download PDFInfo
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- CN210529493U CN210529493U CN201920645641.0U CN201920645641U CN210529493U CN 210529493 U CN210529493 U CN 210529493U CN 201920645641 U CN201920645641 U CN 201920645641U CN 210529493 U CN210529493 U CN 210529493U
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Abstract
The utility model relates to an anti-drop device of suspension cable bumper shock absorber belongs to suspension cable technical field. The device is sleeved on a cable body and comprises a baffle and a support, wherein friction components are fixedly arranged at two ends of the support respectively, a connecting pipe is arranged between the support and the baffle, the support and the connecting pipe are fixedly connected through the friction components, the baffle and the connecting pipe are fixedly connected through welding, and a rubber strip is fixed on the outer side of the baffle. The friction assembly comprises a rubber gasket, a front pressing plate and a rear pressing plate are respectively arranged on two sides of the rubber gasket and fixedly connected through bolts; the front pressing plate is fixedly connected with the connecting pipe in the front friction assembly, the rear pressing plate is fixedly connected with one side of the support, and the front pressing plate is fixedly connected with the other side of the support in the rear friction assembly. The device is pushed to the tower end by the aid of the climbing vehicle, so that the device is simple and convenient to install, the shock absorber is prevented from falling off, safety of high-altitude operation is improved, and labor intensity of constructors is reduced.
Description
Technical Field
The utility model relates to an anti-drop device of suspension cable bumper shock absorber belongs to suspension cable technical field.
Background
The stay cable is used as a main bearing component of the cable-stayed bridge, is not only used for bearing the dead load of the bridge, but also used for bearing the vibration caused by the influence of natural factors and human factors in the construction and operation processes, and the vibration phenomenon of the stay cable is more and more prominent along with the gradual increase of the span of the cable-stayed bridge and the increasing of the length-diameter ratio of the stay cable. The vibration of the stay cable can not only produce the repeated flexure at the anchoring part of the stay cable to cause the fatigue damage of the stay cable, but also destroy the sealing system at the root part of the stay cable, even cause the breakage of a cable conduit, lead the water at the root part of the stay cable to accumulate, accelerate the corrosion of the stay cable, and further influence the safety and the durability of the cable-stayed bridge.
The most common method for vibration reduction of the stay cable is to adopt a vibration absorber, and the built-in vibration absorber is generally divided into a damping type, a bolt type, a wedge type and the like. With the increase of the operation life of the bridge, the rubber gasket and the wedge block of the built-in shock absorber at the tower end are likely to fall under the action of wind vibration and rain vibration. At present, the falling of a built-in damper of a plurality of cable-stayed bridges has a great influence on bridge floor traffic and the safety of passing vehicles and personnel on the bridge. The risk of falling objects is high, and the falling influence is reduced to the minimum by adopting anti-falling measures.
The built-in shock absorber can be prevented from falling off by additionally arranging the steel bar welding derrick outside the shock absorber and fixing the hoop, but high-altitude welding operation and manual installation are required, the workload is large, the risk is large, and the cable body has the eccentric condition in the cable guide pipe; the problem that the installation cannot be carried out exists in the construction process, the anchor ear is designed after the tower end needs to be lifted up and down for many times and the eccentric cable body is actually measured, and the workload is greatly increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an anti-drop device of a stay cable shock absorber aiming at the prior art, which is simple and convenient to install and does not need welding and bolt connection; effectively prevent that the bumper shock absorber from droing, improve high altitude construction's security, reduce constructor's intensity of labour.
The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides an anti-drop device of suspension cable bumper shock absorber, the device overlaps on the cable body, including baffle and support, the support is worn to overlap in cable body periphery, and the front and back end of support is fixed respectively and is equipped with friction assembly, the support passes through friction assembly to be supported on the cable body, the baffle passes through the connecting pipe and fixes with the friction assembly interval of support front end, and the cable body passes the baffle, the baffle outside is fixed with the rubber strip.
The friction assembly comprises a rubber gasket, a front pressing plate and a rear pressing plate which are positioned on the front side and the rear side of the rubber gasket and fixedly connected through bolts; a front pressure plate in the front friction assembly is fixedly connected with the connecting pipe, and a rear pressure plate is fixedly connected with the front end of the bracket; and a front pressing plate in the rear friction assembly is fixedly connected with the rear end of the bracket.
The support is divided, the support includes two semicircle supports, and two semicircle supports overlap respectively in the cable body surface and through bolt involution fixed connection.
The inner orifice diameter of the rear pressing plate in the friction assembly is larger than the inner diameter of the rubber gasket, the inner orifice diameter of the front pressing plate is smaller than the inner diameter of the rear pressing plate and larger than the inner diameter of the rubber gasket, when the support moves forwards along the cable body, the rubber gasket can be turned over backwards along the inner hole of the rear pressing plate, and meanwhile the inner diameter of the rubber gasket is not larger than the outer diameter of the cable body and can be always hooped on the cable body.
The rear pressing plate and the front pressing plate are of a split structure, the rear pressing plate comprises an upper half rear pressing plate and a lower half rear pressing plate, the upper half rear pressing plate and the lower half rear pressing plate are fixedly connected through bolts after being closed, the front pressing plate comprises an upper half front pressing plate and a lower half front pressing plate, and the upper half front pressing plate and the lower half front pressing plate are fixedly connected through bolts after being paired.
The baffle sets up for the slope of cable body, and its inclination satisfies when dropout prevention means reachs the tower end, and the tower end reeving hole can openly be plugged up to the baffle, prevents that the bumper shock absorber in the reeving hole from droing.
Compared with the prior art, the utility model has the advantages of: an anti-falling device of a stay cable shock absorber is pushed to a tower end by a climbing vehicle. Due to the dead weight of 230kg of the creeper, the cable winding body of the anti-falling device is prevented from being twisted in the pushing process. When anti-drop device moved forward along the cable body, the rubber packing ring turned over backward along the hole of back clamp plate, reach cable tower end until anti-drop device, after reaching the top, lift off anti-drop device off from the climbing car, the climbing car returns, anti-drop device can take place the trend of retreating under the effect of dead weight, retreat a segment distance, this retreat action can order about rubber packing ring and reset forward, but because preceding clamp plate internal diameter is greater than the rubber packing ring, the forward upset trend of rubber packing ring has been prevented, cause the rubber packing ring to cramp on the cable body, thereby realize fixed skid-proof effect.
In the process of forward movement of the anti-falling device, the rubber gasket is turned backwards, so that the frictional resistance with the cable body can be reduced, and the anti-falling device can move smoothly; after the anti-drop device is in place, the cable body needs to be firmly hooped by the anti-drop device to prevent sliding, and the cable body is radially hooped by the rubber gasket by utilizing the retreating action of the anti-drop device.
This application preferentially utilizes the climbing car to promote the tower end with dropout prevention means, prevents that the bumper shock absorber from droing, has improved high altitude construction's safety, reduces constructor's intensity of labour.
Drawings
Fig. 1 is a schematic view of an anti-drop device of a stay cable damper according to an embodiment of the present invention;
fig. 2 is a partial schematic view of a bracket and a friction component in an anti-drop device of a stay cable damper according to an embodiment of the present invention;
FIG. 3 is an assembly view of the creeper and the anti-drop device;
in the figure, a back pressure plate 1, a rubber gasket 2, a bracket 3, a cable body 4, a front pressure plate 5, a connecting pipe 6, a baffle 7, a rubber strip 8 and a bolt 9 are arranged.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1, the anti-falling device of the stay cable damper in this embodiment is sleeved on a cable body, and includes an annular baffle 7 and a split type bracket 3, the bracket 3 is sleeved on the periphery of the cable body 4 in a penetrating manner, friction components are respectively fixed at the front and rear ends of the bracket 3, the bracket 3 is supported on the cable body 4 through the friction components, the baffle 7 and the front friction components are fixed at intervals through a connecting pipe 6, the baffle 7 and the connecting pipe 6 are fixedly connected by welding, and a rubber strip 8 matched with the baffle 7 is fixed on the outer side of the baffle 7. The baffle 7 is obliquely arranged relative to the cable body 4, and the inclination degree of the baffle 7 meets the requirement that when the anti-falling device reaches the tower end, the baffle 7 can positively block the cable penetrating hole at the tower end to prevent the shock absorber in the cable penetrating hole from falling off.
As shown in fig. 2, the friction assembly comprises a rubber gasket 2, a front pressure plate 5 and a rear pressure plate 1 are respectively arranged on two sides of the rubber gasket 2, and the three are fixedly connected through a bolt 9; a front pressure plate 5 in the front friction assembly is fixedly connected with a connecting pipe 6, and a rear pressure plate 1 is fixedly connected with the front end of the bracket 3; and a front pressure plate 5 in the rear friction assembly is fixedly connected with the rear end of the bracket 3 through a bolt 9. The inner diameter of the rear pressing plate 1 is larger than that of the rubber gasket 2, the inner diameter of the front pressing plate 5 is smaller than that of the rear pressing plate 1 and larger than that of the rubber gasket 2, and the inner diameter of the rubber gasket 2 is not larger than the outer diameter of the cable body 4 and can be always hooped on the cable body. The difference of the inner diameters of the pressure plates at the left side and the right side of the rubber gasket 2 controls the rubber gasket 2 to be in friction turnover in the process of moving back and forth along the cable body, so that the anti-skid effect is achieved.
The annular baffle 7 is arranged obliquely, so that the deviation between the annular baffle and the cable guide pipe is minimized, and the problem of eccentricity of a cable body is solved.
As shown in fig. 2, the bracket 3 includes two semicircular brackets, the two semicircular brackets are in an "Ω" shape, and the two semicircular brackets are respectively sleeved on the surface of the cable body and fixedly connected with each other by bolts 9.
The rear pressing plate 1 and the front pressing plate 5 are of split structures respectively, the rear pressing plate 1 comprises an upper half rear pressing plate and a lower half rear pressing plate, the upper half rear pressing plate and the lower half rear pressing plate are fixedly connected through bolts 9 after being closed, the front pressing plate 5 comprises an upper half front pressing plate and a lower half front pressing plate, and the upper half front pressing plate and the lower half front pressing plate are fixedly connected through bolts 9.
The device is installed at the end position of a stay cable beam, a climbing vehicle is arranged at the bottom of an anti-falling device, two bolt holes are formed in the bottom plate of the anti-falling device along the diameter direction, a pin shaft with the size corresponding to that of the bolt holes is welded at the front end of the climbing vehicle, the bottom end of the climbing vehicle is conical, and before moving upwards, the conical bottom end of the climbing vehicle pin shaft is jacked into the bolt holes and is temporarily fixed with the anti-falling device to form a whole. Is pushed to the top of the tower under the action of a climbing vehicle. Due to the dead weight of 230kg of the creeper, the torsion of the anti-falling device in the pushing process is avoided. The rubber gasket 2 can be turned backwards by an angle under the action of the pushing force of the climbing vehicle until the climbing vehicle pushes the anti-falling device to the position of the stay cable tower end, so that the rubber strip 8 can block the cable penetrating hole at the tower end to prevent the shock absorber in the cable penetrating hole from falling. At this moment, lift off-proof device off from the climbing car front end, the climbing car returns, and anti-drop device can retreat a small distance under the effect of dead weight, and this retreat action just can make the rubber packing ring 2 that turns over backward reset forward, because preceding clamp plate 5 internal diameter is 1 centimetre bigger than rubber packing ring 2, has prevented rubber packing ring 2 to turn over forward, and rubber packing ring 2 can only radially tightly clamp on cable PE sheath like this to reach fixed, skid-proof effect.
Referring to fig. 3, the climbing vehicle is used to improve the safety of the high-altitude operation in a matching manner of the anti-falling device.
In order to determine the abrasion condition of the rubber gasket 2 and whether micro-movement occurs within a certain time, a falling-off prevention device is simulated and installed on a cable body of a Jiangyin five-star bridge which has no great difference with the performance of a cable body of a cable of a Sutong bridge, and an abrasion resistance test and a displacement test are carried out on the rubber gasket 2.
The longest stay cable of the Souton bridge is 577 meters, and repeated simulation tests are carried out in a cable body area with the length of about 10 meters. In the 10-meter cable body area, after the anti-drop device is installed at the bottom end for the first time, the anti-drop device is jacked to the position 5 meters by using a climbing vehicle and then returns to the starting point, the anti-drop device is used as a cycle to continue a second test, the total cycle is simulated for 90 times, and the length is about 900 meters.
(one) wear measurement
1. Determining an initial tractive effort
In the first test process of the anti-falling device, the anti-falling device moves upwards to a position of 5 meters, the upward initial traction force is determined through the traction of the spring scale, the anti-falling device moves downwards to the bottom end, and the downward initial traction force is also determined through the connection of the spring scale and the climbing vehicle.
2. Tractive effort contrast analysis
And measuring the traction force of the upward movement and the downward movement once per test, comparing and analyzing the traction force with the previous traction force, and if the difference is small, performing the next test and circulating the test.
3. The results prove that
After 90 cycles, the measured traction force is compared with the initial traction force, and if the difference is small, the rubber gasket is proved to be less worn and good in wear resistance.
(II) Displacement measurement
1. After the anti-falling device moves to a certain position (about 10 meters), measuring the linear distance between the cable guide pipe and the bottom end of the anti-falling device;
2. the preset period is two months, the distance is measured every other week for 8 times;
3. and comparing the 8 times of data, and if the distance is not changed, the anti-falling device cannot slightly move within a certain time in the future.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (6)
1. Anti-drop device of suspension cable bumper shock absorber, the device overlaps on the cable body, its characterized in that: the cable body is characterized by comprising a baffle and a support, wherein the support is sleeved on the periphery of the cable body in a penetrating manner, friction components are fixedly arranged at the front end and the rear end of the support respectively, the support is supported on the cable body all the time through the friction components, the baffle is fixed at intervals with the friction components at the front end of the support through a connecting pipe, the cable body penetrates through the baffle, and a rubber strip with a plugging effect is fixed on the outer side of the baffle.
2. The drop preventing device of a stay cable damper according to claim 1, wherein: the friction assembly comprises a rubber gasket, a front pressing plate and a rear pressing plate which are positioned on the front side and the rear side of the rubber gasket and fixedly connected through bolts; a front pressure plate in the front friction assembly is fixedly connected with the connecting pipe, and a rear pressure plate is fixedly connected with the front end of the bracket; and a front pressing plate in the rear friction assembly is fixedly connected with the rear end of the bracket.
3. The drop preventing device of a stay cable damper according to claim 1, wherein: the support is divided, the support includes two semicircle supports, and two semicircle supports overlap respectively in the external surface of cable body and through the bolt involution fixed.
4. The drop preventing device of a stay cable damper according to claim 2, wherein: the inner orifice diameter of the rear pressing plate in the friction assembly is larger than the inner diameter of the rubber gasket, the inner orifice diameter of the front pressing plate is smaller than the inner diameter of the rear pressing plate and larger than the inner diameter of the rubber gasket, when the support moves forwards along the cable body, the rubber gasket can be turned backwards along the inner hole of the rear pressing plate, and meanwhile the inner diameter of the rubber gasket is smaller than the outer diameter of the cable body, so that the hoop can be always hooped on the cable body.
5. The drop preventing device of a stay cable damper according to claim 4, wherein: the rear pressing plate and the front pressing plate are of a split structure, the rear pressing plate comprises an upper half rear pressing plate and a lower half rear pressing plate, the upper half rear pressing plate and the lower half rear pressing plate are connected in a matched mode and then fixedly connected through bolts, similarly, the front pressing plate comprises an upper half front pressing plate and a lower half front pressing plate, and the upper half front pressing plate and the lower half front pressing plate are connected in a matched mode and then fixedly connected through bolts.
6. The drop preventing device of a stay cable damper according to claim 1, wherein: the baffle sets up for the slope of cable body, and its inclination satisfies when dropout prevention means reachs the tower end, and the tower end reeving hole can openly be plugged up to the baffle, prevents that the bumper shock absorber in the reeving hole from droing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920645641.0U CN210529493U (en) | 2019-05-05 | 2019-05-05 | Anti-falling device of stay cable shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920645641.0U CN210529493U (en) | 2019-05-05 | 2019-05-05 | Anti-falling device of stay cable shock absorber |
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| Publication Number | Publication Date |
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| CN210529493U true CN210529493U (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920645641.0U Active CN210529493U (en) | 2019-05-05 | 2019-05-05 | Anti-falling device of stay cable shock absorber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080107A (en) * | 2019-05-05 | 2019-08-02 | 江苏法尔胜缆索有限公司 | The anti-drop device of suspension cable damper |
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2019
- 2019-05-05 CN CN201920645641.0U patent/CN210529493U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080107A (en) * | 2019-05-05 | 2019-08-02 | 江苏法尔胜缆索有限公司 | The anti-drop device of suspension cable damper |
| CN110080107B (en) * | 2019-05-05 | 2024-03-12 | 江苏法尔胜缆索有限公司 | Anti-drop device of stay cable shock absorber |
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